Visibility Rules to have "Always" option

I really like your Add-On based on the demo and your videos. Keep up the good work!

Maybe this is already on your to-do-list... I would like to have a field that I have added a manually entered default value to to always remain hidden.

Is it possible to do that in some way already? Otherwise my request in order for me to be able to use your Add-On is to have an "always" option alone with the existing "any" and "all" select options on the Visibility Rules tab for a field.